We all know that YouTube is the most popular video content website. Every video that you want to watch can be seen on you tube. It doesn't matter if that is a tutorial for some things , movies, short films and music videos you can easily find it from YouTube website.
Usually YouTube visitors watch video streaming over the Internet. But sometimes you want to watch other videos without internet connection. So what you should do is download the video straight to your computer so you will still be able to watch it when you don't have an internet connection.
There is no way you can watch YouTube videos without internet connection so you can take advantage of your internet connection while downloading other videos and buffering some of it. One of the reason too, why you want to download videos is you want to get a copy for your phone and other gadgets.
The easiest way to download YouTube videos is through its website. This makes YouTube videos get more ways to be shared to more people when you don't have an internet connection on that same time. If you have RealPlayer software in your computer you can straightly download videos from Youtube. With using RealPlayer you will notice that when you hover your mouse to the YouTube video frame you will see a button that says "Download this video". This will save your video to the RealPalyer library and allows you to burn to DVD files and watch it again and again without internet connection.
If you don't have any software that rip video you can try to look for websites like KeepVid.com or SaveVid.com.